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Problem#4: A timber section with nominal 4 in x 12 in rectangular section is used on a simple span of 13 ft. The beam supports a uniformly distributed load of 355 lb/ft (including the weight of beam). Determine the (a) Maximum flexural stress due to bending (b) Maximum Shear stress

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I n 12 in T3 max 1270 kip/- ay 2 bd て 11615 2 x0.333

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